I just added a Finnex FugeRay 10" light to my Spec III. Fits perfectly and at least doubled if not tripled the light in my tank compared to the stock one. I was worried the 7000k lights would be too blue (I prefer a warm-looking planted tank), but they actually look great. I leave the moonlights off because they add too much blue (and the moon's light isn't blue anyway!).

I also got a new inhabitant, a slime mold! Apparently it's harmless. I can actually watch it moving through the day. It started on the ground this morning and is now arching its way across the glass. Those two pictures are about 1.5 hours apart. It's pretty fast.

I'll have to watch how the plants do with this light, and how the algae growth does.